Strain-insulator.



L. STEINBERGER.

Patented Nov. 1, 1910.

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UNITED sTATns rarmvrl omnes.

Louis STEINBERGER, or NEW Yoan, N. Y.

STRAIN-INSULATOR.

To all whom it may concern:

Be it known that I, Louis STEINBERGER, a citizen of the United Statesfand a resident of the city of New York, borough of Brooklyn, in the county of Kings' and State of New' York, have invented a new and Improved Strain-Insulator, of which the following is a full, clear, and exact description.

My invention relates to strain insulators admitting of general use and also of various special uses in connection 'with wireless towers, commercial cables, and in practically all relations Where great insulating strength is to be combined with great mechanical strength.

Among the objects sought to be accomplished by my invention are the following: I. To increase the protection given to the body portion of the insulator in order to prevent the leakage of the current due to moisture; Il. To specially insulate the metallic suspension members Within the body member; III. To give the metallic suspension members such form as will greatly increase the mechanical strength of the insulator; IV. To protect the ends of the body portion Where subjected to undue mechanical strains byy inclosing them in metallic caps; V. To secure the aforesaid metallic caps toward each other and thereby cause them tobind hard upon the body member; VI. To protect the lowermost of said caps from the action of moisture; VII. To render various internal parts of the insulator readily accessible; VIIl'. To give the metallic suspension members such configuration aswill confer upon them a mechanical strength Without impairing their insulation; IX. To provide one of the metallic suspension members with an anchor disk possessing a maximum of mechanical strength for a given Weight of material; X. To give the anchor disk just mentioned a .peculiar shape, in order to facilitate its insulation Without impairing its` mechanical strength; XI. To provide fillings of improved form for various cavities and recesses Within the body portion; XII. To improve generally the construction and eiioiency of various parts of the insulator.

Reference is to be had to the accompanyingI drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all l the figures.

p Specicationof Letters Patent.

Application led June 17, 1910. Serial No. 567,418.'

Patented'Nv. 1, 1910.

in perspective the upper tension member carrying the anchor plate associated with it.

A body member 6 is made of insulating material, preferably electrose or hard rubber, and is provided with a central frustoconical portion 7 integral With it. Encircling this portion 7 and extending considerably below the same is a petticoat 8. ik hood 9 encircles this petticoat and is integral with it, as Well as with the body member 6. .The slant of the hood 9 is the saine as that of the body member 6, these two parts presenting from the outside the appearance of a single cone frustum. The upper portion of tie body member 6 is provided with a neck 10 having generally an annular form. The body member 6 is further provided with an annular recess 11,the upper portion of which bounds the inner surface of the annular neck 10. An anchor ring is shown at 12 and is provided with bolt holes 122 and with a large central opening 12b. Two bolts 13 provided with heads 111 are adapted to extend through the bolt holes 12a and are dtted with nuts 15, being threaded for this purpose. A larger bolt 16 is provided adjacent to one of its ends with a thread 17 and at its opposite end with an anchor disk 18, the latter being provided with large apertures 19, each having a circular outline, as .indicated in Figs. 8 and 5. The anchor disk 18 is provided with a rounded thickcned portion 20 (see Fig. 1) integral with it and servino to strengthen it., The lower end of the bodjy member 7 is provided with a central axial recess containing a filling 21 which may. be of softer insulating material 4than saidbody member.,

The annular recess 11 contains a similar illin 21 of soft insulating material. A. metallic cap Q2 provided with an annular flange 23 is fitted upon the lower end of the frustoconical portion 7 and is provided with an eye 24:. The bolts 13 extend through openings in the cap 22 and the nuts 15 hold this cap rigidly in position, causing it. to bind against the lower end of the frustoconical portion 7 and also against the lower end of the filling 21. rllhe body portion 6 is provided centrally with a tubular member 25 integral with it and forming the inner boundary of the annular passage 11.

At 26 is a metallic cap which is provided with an annular flange 27, the latter fitting neatly around the neck 10. An eye 29 is provided with a socket 28 which is threaded internally and fitted upon the threaded portion 17 of the bolt 16'. At 18a is a fiber washer against which the pressure of the anchor disk 18 is exerted. At 13 is another fiber washer which in this instance meets the anchor ring 12 and sustains the pressure due to the pull of the bolts 13.

ln assembling the various parts, the body member 6 is irst inverted and the bolt 16 carrying the anchor disk 18 is dropped into it so that the threaded portion 17 of the holt 16 protrudes. rlhe bolt ,16 is temporarily held inthis position and the body member is now inverted, the anchor ring 12 and washer 13 being now dropped into the annular recess 11 and the bolts 13 being threaded through the openings in the anchor ring and was er. 'lhe iillings 21, 21EL are next placed in position, which may be done by melting the tillings and pouring them in, or by merelyittingthem in by hand it the materials are hard and cold. rlll-he caps 22, 26

are next placed in position, the cap22 being held by pressure of the nuts 15 and the cap 26 bein secured by pressure of the socket 28.

It wi l be'noted that the annular ilange 27 being directed downwardly when the parts are in the position indicated in Fig. 1, any water or moisture falling upon the cap 26 is readily carried 0H and must follow the inclination of the body member 6 and hood 9, finally making its escape from the outer and lower edge of .this hood. It will also be noted that all parts immediately connected with the bolts 13 are sheltered from the action of moisture and are completely protected by the petticoat 8, the upper portion of this petticoatbeing in turn protected by the hood 9.

rlhe operation of my device is not reatly different from that of other strain insula-v tors of my invention.

rlheeye 29 is connected to a cable, a wire or a suspension member of any kind, or even to another insulator, and the eye' 24 being similarly connected, the device will resist a considerable' mechanical strain and may be subjected to a very high, voltage without injuring .any 'ot the parts..

l' do not limit myselrn to any particular material to be used in the construction of this' insulator orany of its parts. Neither do l limit 'myself to the precise arrangeermelo ment shown for the various mechanical features, nor to any special proportions or shapes for the parts except as specified in my claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A strain insulator, comprising a body member provided with a recess and with an opening merging into said recess, a single metallic tension member extending through said opening and provided with an anchor disk located Within said recess, a plurality of metallic tension members disposed upon opposite sides of said single metallic tension member, and means for anchoring said plurality ot' metallic tension members relatively to said body member.

2. Jifltistrain insulator, comprising a bod)v member provided witlra tubular portion integral therewith, and further provided with an annular recess bounding said tubular portion, a metallic ring disposed within said annular recess, metallic tension members cxtending through portions of said metallic ring and exerting tension upon said body member in one direction, and means for ex erting tension upon said body member in the opposite direction.

3. A strain insulator, comprising a bodyv member provided with a tubular portion integral therewith and further provided with an annular recess concentric to and forming a boundary' for said tubular portion, a metallic ring' mounted within said annular recess and provided with bolt holes, a plurality of bolts extending through said bolt holes for exerting tension upon said body member in one direction, and a single bolt' provided with a portion engaging said body member for exerting tension thereupon in the opposite direction.

4. A strain insulator, comprising a body member provided with a tubular portion integral therewith and further provided with a recess extending toward but not reaching said tubular portion, a single bolt extending through said tubular portion and provided with an anchor disk disposed within said recess for exerting tension upon said body member in one direction, Ia filling disposed withinsaid recess, a cap covering said illl ing, and tension members extending through sald cap and provided with means for exerting tension upon said body member in a `direction contrary to that exerted by said single bolt.

5. A strain insulator, comprising a body member provided with a tubular portion in- Y .tegral therewith, and further provided with an annular recess concentric to said tubular ortion, an anchor ring and a washer fitted into said annular recess, bolts extendin through portionsof said anchor ring and alsothrough portions of said body member, a metallic cap engaging said body member, means connected with said bolts for exerting ressure upon said cap, and a-tension mem er connected With said bod portion and extendin in a directionopposite to that in 'which sai bolts extend.

6. A strain insulator, comprisinga body member provided with a tubular portion integral therewith and further provided withl an annular recessl encirclin said tubular portion, a metallic cap rovi edI with a portion engagin said b y member and also engaging sai tubular portion, mechanism engaging said cap for exertingA upon said body member a pull in one direction, and

mechanism including a member disposed within said annular recess for exerting upon said body member a pull in the opposite direction.

. 7. A strain insulator, comprising a .bodyy member of insulating material provided with a recess, a bolt extendin partially through said body member an provided with fin-anchor disk havin recesses, a plurality ofbolts disposed wit in said recesses and thereby spaced from said anchor disk and said first-mentioned bolt, and means connected with said bolt for suspendin said body member of insulating materia andk parts carried thereby. 4

8. A straiii insulator, comprising a body member having a recess and also havin a bolt hole, said recess and said bolt hole being axial relatively to said body member, a bolt fitting into said bolt hole and provided with an anchor late fitting into said recess, a plurality ofp other bolts extending partially through said body member, and means for exerting tension u on said bolts.

9. A strain insu ator, comprising a' body member of insulating material provided with a recess, a single bolt engaging said body member and provided with an anchor disk ldisposed* Within said recess, said anchor disk bei g provided with recesses each having a bou dary of substantiall arcuate form, a pluralit of bolts exten ing artially through said body member, said astmentioned 'bolts extending centrally through said recesses of! said anchor disk and thereby spaced from said anchor disk. and from the bolt carrying the same, and means con- Iname to this specification in the -nectedwith all of said bolts for mounting said body portionand parts carried thereb 10. A strain insulator, comprisin a b y member provided with a recess an with a bolt hole mergin into said recess, a bolt extending throng said bolt hole and provided With an anchor late, said anchor plate having generally t e form of a disk provided with two recesses disposed u on opposite sides of said bolt, said anchor isk being further provided with a thickened 4portion co-axial with said bolt for the purpose of strengthening said anchor disk, and tension members extending paitiall throu h aild body member and insulated rom said l11. A strain insulator, comprising a body member of insulatin material, an anchor ring disposed within sail body member, a filling engagin said body member and covering said lanc or ring for the purpose of insulating the latter, a cap mounted u on said bod member and covering-said fil ing, and

mec anism engaging said cap for suspending said body member and parts carried by thesame. 12. A strain insulator, comprising a body 4member of insulating material providedV with a centrally disposed extension integral therewith, and further provided with an annular recess boundin said extension, and with a second recess isposed Within said body member, and also provided with a hole extending through said extension and mergin into said second recess disposed within said body member, and a plurality of holes extending through said body member and merging into vsaid annular recess.

13. As an article of manufacture, a body Witnesses:

WAL'roN HARRISON, JOHN P. DAvis. 

